Refrigerating apparatus.



H. H. SOUTHWORTH.

REFRIGERATING APPARATUS.

Patented Nov. 30, 1915.

3 SHEETS-SHEET 1.

lzzfelzlf H. H. SOUTHWORTH.

REFRGERATING APPARATUS. APPucAToN FILED N0v.22. 1912.

PatentedNov. 30, 1915.

3 SHEETS-SHEET 2.

QMA

H. H. SOUTHWORTH.

,REFRIGERATING APPARATUS.

APPLfcATmN FILED Nov, 22. |912.

Patented Nov. 30,1915.

3 SHEETS-SHEETS.-

afw/Lbmf/wff/L HARRISON H. lsouruwoiazrrry or cIIEvnLAN-D, omo, AssiGNoR, BY MEsNE ASSIGN- MENTS, iro 'rHEIcELEss MACHINnzooMrANx, or CLEVELAND, omo, A CORPORA- TION GF DEKO.

To A@all whom t may concern Be it known that I, WORTH, a citizen of the United States, and a resident of Clevelandin the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Refrigerating Apparatus; and I do hereby declare that the following is a full, clear, and

liquor in the generator-absorber) is driven from the generator-abso-rber to the condenser during the period of. generation and practically all of said ammonia passes from the condenser through the refrigerating coils to the generator-absorber during the period v the refrigerating coil back to the generatorof absorption, there being no surplus ampointed out in the appended claims.

monia in the system to` continue the process of refrigeration at the time when the,v generator-absorber has reached the end of its period of absorption and begins its periodof generation. l

`The invention consists of thev matters hereinafter described and more vparticularly ln the drawings z-Figure l-is a view representing in side elevation an apparatus embodying my invention. Fig. 2 is a view representing a front elevation'of the same. Fig'. 3 is aview representing, on an enlarged scale, a partial vertical section through Fig. 1, as indicated by the line 3-3 of Fig. 1. Fig. 4 is a view representing a vertical section through one of the diaphragm casings that will be referred to more particularly later. Fig. 5 is a partial vertical section on an enlarged scalein a plane indicated by the linel 5-5 of Fig. 3. Fig. 6 is a partial horizontal section on a like scale in a plane indicated by the line 6-6 of Fig. 3. Fig. l7 is a perspec-` Specication Letters Patent.l

HARRISON H. SoUTH- i Patented Nov. 30, 1915.

. Application ala Novemer 22, `1912'. serial No. 732,807.

tive view of one of the operating arms used to control the movement ofthe burner. Fig. 8-1s a vertical central section of a valve mechanism interposed'in the conduit leading to the refrigerating coils. l Referring now to that embodiment of my invention illustrated in the drawings, 10 lndicates a drum or still which-may be of any suitable construction adapting it to act as a generator-absorber in a refrigerating apparatus using a distil-lant refrigerant preferably ammonia. l

.'11 indicates a drum which may be'of like construction and which is adapted Ato act as receiver. It will be hereinafter called ar condenser. Said drums are supported upon a suitable frame 12.which stands in an oblong tank 12a adapted to containy cooling water.

The generator-absorber drum l0 is con- 'an ammonia condenser and liquid ammonia f nected to the condenser drum 11 by a pipe 13 through which the ammonia gas driven from the liquor in the drum 10 during the process o f generation, is ledinto the drum 11 wherein it is condensed, a 'check valve 13x on this pipe preventing back How.

14 indicates a return-pipe leading from absorber drum 10 and adapted to direct the expanded ammonia gas after it has done its work in the refrigerating coil back into said generator-absorber.

14x indicates a check-valve to prevent a back, fiow. from the generator-absorber to .and swinging with said burner are two troughs 18, 19, located at either side of the burner and extending vparallel thereto.

Above the generator-absorberjdrum is lo-y cated a cooling water tank 20 which extends longitudinally of said drum and through which apart 13 of the pipe 13, connectingl Below said vtank is placed a longitudinally extending pipe'21 which is placed immediately above the generator-absorber l0 and its? provided with` openings to discharge coolingwater upon the same. Said pipe is .connect ed to a. funnel 21a arranged adjacent the rear e'nd of and attached to the side of the cooling water 'tank 20. An overflow pipe 20, connected to the opposite side of the tank 20, leads down to a point below the generator-absorber where it has a discharge nozzle 20 adapted to discharge water into one of the tanks fixed to the burner, namely, the tank` 19, when the same is brought into position below it.

i 22 indicates a water supply pipe provided With la spout 22 capable of oscillatory movement and arranged to discharge water into the funnel 21a or into the tank 200. Said spoutv is cscillated by a lever 23 (see Fig. 1)l

Which, as shown', is fulcrumed on a pin 23a fixed tothe rear end of the drum 10 Vand has a fork 23 J at itslower end that engages a rearward projecting rod or pipe V17 on .the burner pipe. f Thus when 'the lburner swings', the lever 23Ajwill vswing with it. A

casing forwardly projecting forked armf23c is provided -at the upperl end ofthe lever 23 for engagement with the water spout 228'. Thus the movement of theburner .will cause the spout 22a to swing from a position above the funnel 21 to a position above the tank 20 and back again in a mannerV presentlyito be described. v

24 indicatesa radial rock-arm-made rigid .owith'the rock-shaft pipe 16 and carrying at :its end a quadrant 24a provided with oppositely facing, spaced radial shoulders 25, 26.

27 indicates a casing containing acha-mf ber 27a (see Fig. 4) in vwhich is located a diaphragm 27". Said casing is connected on its lower side by a-pipe 27? withthe condenser 11 so that the diaphragm ,27b issub-` jected to the pressure in the condenser. The diaphragm 27b is arranged to actuate a vertically movable stem 28 located above it and projecting through the upper part of the casing in a posltlon to engage a horizontally disposed lever 29 which is fulcrumed on the 30 indicates the fulcrum of said lever placed intermediate the stem 28 and the burner l5.

The `outer end of the lever 29 is connected by a coiled spring 31 with a fixed part ofthe casing 27. 1 To the inner end of the lever 29 is connected a depending link 32 which has operativeconnection at its lower end with an arm 33, (s ee Figs. 2 and 3) that is ful-I crumed to swlng in a vertical plane on an upright lug 34 made rigid with a transverse bar 35c on the mam supporting frame 12.

` otallyV connected to it.

lever. 33 as shown Yhas an extension 3 5 piv- Said extension 35 is provided at its inner end with-a lug 33b .arranged to engage one of 'the shoulders on the quadrant 24a (as shown the radial shoulder 25). The extension 35 and the lever 33 lhave, on their lower sides, abutting shoulders "or lugs 33a, 359,. respectively, and a spring36 lixed 'to the lever 33 and engaged with the. upper edge of the extension 35, yieldingly engages the said extension so as to normally hold the extension in such position, with reference to the arm 33, that the two shoulders 33 'and .35a are normally in engagement. The purpose of this construction will appear-presently.

37 indicates a second'dia'.phragm casing which may be 4of a construction similar to that of the casing 27 The top side of said casing is connected to a pipe 38 containing a` fluid adapted to boil at a comparatively low temperature to be predetermined and which pipe extends into the generator-ab sorber drum 10,'so as to be affected by the temperature maintained in said drum. The pressure in the said fluid pipe acts on a iaphragm within the casing as before which is arranged to engage a vertically movable stem 39.

40 -indicatesa llever fulcrumed at 41 to the lower side of the casing 37 and having one arm 40a which is engagedby the stem 39. `The other arm 40b of said lever 40 carries a depending link 42 `(see Fig. 3) which is operatively connected with a vertically swinging arm 43` pivoted on an upright lug 44 rising from the transverse bar 35c of the main frame. I T he arm 43 has a Divoted eX-" tension 45 carrymg a laterally extending lug 45b adapted for engagement withbne of the radial shoulders of the quadrant 24a, in this case, the shoulder 26. Said extension, as

in the case of the arm is made so as toyield in' an upward directlon with referencel and in the casing 37 in order to cause suitif cient pressure to actuate the lever 40 so as to raisethe arm43. AAs shown, the ends of the spring 48 are provided with adjusting nuts I i the rock-shaft pipe 16 by ymeans of a main supply pipe 50 containing a spring contrlled valve mechanism 51 of familiar construction (see Fig. 5). The valve is opened by means of a stem 52 which projects outwardly through the valve casing and is adapted for engagement'with one arm of a bell-crank lever 53 fulcrumed on .a `iiXed arm 54 that is made integral, as shown, with the -valve casing. The other arm ofv the bell-- crank lever isconnected by a link 54a with a radially projecting pin 55 on the burner.

rock-shaft pipe 16. l

When the burner is vin heating position under the drum 10, as shown in Fig. 2, thebell-crank` lever 53` acts, by its engagement with the valve stem 52 to h ol'd. the valve open so. as to permit al free supply of fuel gas to the burner. When the burner swings to the rightvfrom the position shown in Fig.

i 1 tothe position shown in Fig. 2, the rocking movement of the rock-shaft )pipe 16 swings the bell-crank -lever 53 downward and relieves the valve stern of the pressure of said `lever,` vvhereupon the valve is closed.

I prefer to provide, aus shown, a pilot burner 56 located near onev end of the drum .and connectedto the main gas supplyy pipe 50 at a point above the valve 51. Said pilot burner is placed in the neighborhood of the burning position' of the burner', so that when the gas is turned on in the burner it will be lighted by the pilot flame. I also provide a transversely curved plate 12I spaced a short distance from the drum 10 and 'eX- tending longitudinally thereof. Said plate constitutes a shield and acts to prevent water' from dripping from the sides of the drum 10 upon the burner when the burner is in the position shown in Fig'. 3 and the said drumis acting as an absorber. It also has another function to be mentioned later,

n 57x, indicates a pipe or conduit for conveying the liquid ammonia to the refrigerating coil. A valve 57 (see Figs. 2 and 8) is interposed in the pipe 57x. Said valve is controlled by a diaphragm which is subjected to the pressure of the generator-absorber.

58 indicates adiaphragm casing connected with the casing of the valve 57 and containing a diaphragm 59. The upper side of the casing58 is connected by a pipe 60 with the .return-pipe 14 so 'that the diaphragm is always-,subjected to the pressure of the generator-absorber. The diaphragm is adapted to actuate a spring-controlled rod or stem 61 to bring it into engagement with the movable part of the valve 57, in this case a ball 62', and lock it on its seat.

The construction is such that liquid am- 6B monia may freely pass through the valve 57 on its way to the refrigerating coils, except when the pressure of the generator-absorber and the return-pipe 14 has risen to a pre# determined point where it is sufficient to depress the spring-controlled stem 61, in

seat and the further passage of refri erant through the pipe 57x' Will be prevente until the-pressure in the generator-absorber falls below the aforesaid predetermined pressure. This occursat the time the drum 10 ceases to act as an absorber and begins to act as a generator so thata fiow of refrigerant from the`condenser to the' refrigerating coils during the process' of generation is made im-A possible.

, The operation of my improved appara tus is as follows: With-the parts' of the apparatus in the position shown in Fig. 2, the burner is directly under the generator absorber and the gas supply controlling valve 51 is open, so that vthe generator-ao' sorber is being heated and ammonia gas is lConditionof affairs continues until a predetermined temperature is reached in the generator-absorber drum .10' corresponding with and indicating the degree .of Weakness of the liquor in the drum that the apparatus is designed to fpwork to. Thisy temperature, communicated to the steam pipe 38 will cause sufficient pressure therein and in the diaphragm casing 37 to cause the diaphragm to depress 'the stem 39 and operate the lever'40 against the downward' pull of its controlling spring 48 so as to cause it to raise the arm 43 and remove its laterally eX- tending lug 45b above its engaging position with the radial shoulder 26 of the quadrant 24a. This releases the burner, which, by reason of the Weight of Water in the trough 19,.is caused to swing to the right to the position indicated in Fig. 3, when the other' 'which case the. valve will be looked on its v position above the tank 20 to a position above the funnel 21a. This stops a further flow of water through the overiow pipe 20HL and directs the cooling water into the cooling water pipe 21 above the generator-absorber so as to discharge cooling water on the same. This starts the process of absorption in the. drum 10 and as the pressure in the return-pipe 14 is after the drum is cooled lowered beyond the predetermined point at which it is designed to depress the diaphragm 59 controlling the valve 62, said valve is released and the liquid ammonia in theqcondenser is free to'ow toward the refrigerating coil and the process yof refrigeration begins. The water which flows from the pipe 21 flows down about the sides of the drum 10 and falls into the trough 18 which now is in a position to receive the water dropping from said drum. The shield 12x directs the water into the trough 18 from that side of the. drum farthest from the said trough. In the meantime the water in the other trough is flowing through and discharging from said trough into the tank l2 through openings`19a in said trough which are large enough to p'ermit said trough to become emptied before the next movement ofthe burner is required, but which are small enough to' permit the trough to fill when water is being directed into it from the overflow pipe 28 notwithstanding the presence of said opening-19". (The trough 18 is provided with similar openings 18 for a similar purpose). The parts remain in this position until all of the liquid ammonia in the condenser has passed therefrom whereupon the pressure in said condenser will drop. This produces a drop of the pressure in the diaphragm casing 2 7 so that the diaphragm therein will no longer hold the 'stem 28 against the downward action of the spring 31 on the lever 29 whereupon said lever will be swung to raise the arm 33 and thus relieve the lug 33b at the free end of said arm from its engagement with the shoulder 25.- The weight of water in the trough 18 thereupon swings the burner into its first position which movement causes the nozzle 22a to swing into position above the tank 20 and causes the bell-crank lever 53 to act upon the fuel gas supply valve vstem 52 and open said valve, whereupon the burner will be again lighted by the pilot light and the period of generation in the generator-absorber will be again started. This raises the pressure in the generator-absorber and in the return-pipe 14 on the side of the check-valve 14l next the same, beyond the predetermined degree, the ball-valve 62 will be again locked on its seatand the period of refrigeration again stopped. The yielding extensions 35 of the arms 33 are provided so that the downward pressure of the said arms on the quadrant intermediate the period when the4 lugs carried by said arms are in engagement with their respective radial shoulders on the quadrant may not cause friction to .resist the movement of the quadrant when the burner moves from one position to another as above described.

Suitable shoulders 35y (see Fig. 6) are provided on the transverse bar 35c to act as stops for engagement with a pin 35x on the burner to limit its movement in either direction.

In a refrigerating apparatus of the kind described herein wherein the process of refrigeration is in abeyance during one cycle of operation of the apparatus, that is to say,

'during the period of generation of the refrigerant, it is preferable to place the refrigerating coils in a tank of brine, so that the rise o temperature will be comparatively slight during the intermission of the action of the refrigerating coils.

I claim as my invention 1. In a refrigerating apparatus of the absorption type, in combinationY with a generator-absorber, a condenser, and means 'for coolin and vmeans for heating said generator-a sorber in alternation, means acting to discontinue the heating of said generatorabsorber when the absorbent therein has liquid refrigerant in the condenser has been exhausted.

2. In a refrigerating apparatus of the absorption type, in combination with a generator-absorber, a condenser, and means for cooling and means for heating said gento discontinue the heating of said generatorabsorber when 'it has been heated to a predetermined degree of temperature, and means for discontinuing the cooling of said generator-absorber when the pressure in the condenser has fallen below a predetermined point.

- 3. In a refrigerating apparatus of the absorption type, in combination with'a generator-absorber, a condenser, and means for cooling and means for heating said generator-absorber in alternation, means acting to discontinue the heating of said generatorabsorber and for starting the cooling thereof when the absorbent therein has been reduced to a predetermined degree of weak ness, and means for discontinuing the cooling of the generator-absorber and for starting the heating thereof when the liquid refrige'rant in the condenser has been eX- hausted.

4. In a refrigerating apparatus of the absorption type, in combination with agenerator-absorber and a condenser, and means for cooling and means foi` hea-ting the generator-absorber in alternation, means acting 4erator-absorber in alternation, means acting Y to discontinue the heating of said generatorabsorber and for beginning the cooling thereof when the absorbent therein has 4been raised to a predetermineddegree of temperature, and means for discontinuing the cooling of said generator-absorber and for starting the heating thereof when the pressure in said condenser has fallen below a predetermined point.4

5. In a refrigerating apparatus ofthe absorption type, in combination with a generator-absorber, a condenser, and mea-ns for cooling and means for heating said generator-absorber in alternation, means acting to'discontinue theheating of said generatorabsorber when the absorbent .therein has been reduced to a predetermined degree of weakness, means for discontinuing the cooling of said generator-absorber when the liquid refrigerant in the condenserhas been exhausted, and means for automatically shutting off the flow of refrigerant from the condenser during the period while the generator-absorber is generating.

6. In a refrigerating apparatus of the absorption type, in combination with a generator-absorber, a condenser, and meansfor cooling and means for heating said generator-absorber in alternation, means acting to discontinue the heating .of said generatorabsorber when it has been heated to a predetermined degree of temperature, means for discontinuing the cooling of said generator-absorber when the pressure in the condenser has fallen below a predetermined point, and means fory shutting off the fiow from the condenser when a predetermined pressurehas been reached in the generator absorber.

7. In a refrigeratingrg;- apparatus'of theabsorption typein combination with a generator-absorber, a condenser', means for coolmg and meansfor heating said generatorabsorber in alternation, means acting to'disthe heating of said generator-absorber, and

means for automatically shutting oii" the flow from the condenser at the time the generator-absorber begins to be heated.

8.' In a refrigerating apparatus of the absorption type, in combination with a generator-absorber and a condenser, means for cooling and means for heating the generatorabsorber in alternation, j means acting to f' discontinue the heating of said generatorabsorber .and for beginning the cooling thereof when the absorbent in said generator-absorber has been raised to a predeter-mined degree 'of temperature, and `for discontinuing the cooling of said generatorabsorber and for starting the heating thereof when the pressure in said condenser has fallen below a predeterminedl polnt, and means for automatically shutting ofi' the iow from the condenser while the pressure in the generator-absorber exceeds a certain sorber constituting successive cycles of its operation, means forreverslng said cycles, de-

pending for its operation upon a predetermined low degree of saturation in the generatorabsorberand upon a predetermined degree of exhaustion of liquid refrigerant in the condenser, and means for` shutting off the iiow from the condenser during-,the heating cycle of the generator-absorber. l l

l0. In a refrigerating apparatus of the absorption type, in combination with a gencrater-absorber, a return conduit for leadlng the expanded refrigerant back to the generator-absorber, a condenser, a discharge conduit connecting the generator-absorber with the condenser, a third conduit leading from. the condenser to the refrigerating coils, and means for -cooling and means for heating said generator-absorber in alternation, a thermostatic device connected with the generator-absorber acting to discontinue the heating of said generator-absorber andto start the cooling thereof when the absorbent therein has been raised to a predetermined degree of temperature, pressure actuated means connected with the condenser for discontinuing the cooling of said `generator-absorber and for vstarting the heating thereof when the pressure in the condenser has fallen below a predetermined point, a valve in said third conduit, and pressure actuated means connected with said generator-absorber for positively closing said valve while the pressure in said generator-absorber exceeds a predetermined amount.

11,'. In a refrigerating apparatus, the combination, with generating and absorbing means, a stationary, liquid refrigerant container, means for -heating the liquor, means for cooling the liquor, means for automatically terminating the heating and starting/the cooling, and means for automatically terminating the cooling and starting the heating" consequent upon the exhaustion of liquid refrigerant from the container.

12. In an absorption refrigeration apparatus, the combination of a still, a container for liquid refrigerant, a connection between the-same andthe still, meansfor heating trol of the temperature within the still, means -for terminating thecooling'by the exhaustion of the liquid refrigerant from.

its container..v Y n 13. Inlanabsorption refrigeration apparatus, the combination, with'a. still and a stationary liquid refrigerant "container, of`

means :tor heating the still, lmeans for cooling the still, means for automatically turning'off vthe heat toterminate a `generation period, and a device responsive .to the fluid pressure. within the container for automatically terminating an absorption period con- Y sequent upon the complete exhaustion of l' liquid refrigerantfrom the container.

14. In an .absorption refrigeration apparatus, the`combination of a closed `vessel adapted; to containl volatile liquor, a high pressure conduitle'ading romthel vessel, a low 'pressure conduit leading to the vessel, means for cooling the liquor in the vessel, means responsive to Huid pressure for terminating the cooling operation vdependent on Ithe complete exhaustion of liquid refrigerant on the high pressureside of the apparatus.

15. In an-absorption refrigeration apparatus, the combination with a generator-absorber provided with heating and cooling means and acting alternately-as a generator and as an absorber, a liquid refrigerant container into which the generator-absorber' is adapted to discharge, means for. automatically turningpoil" the heat and turning-on the cooling medium to terminate a generating period andgstart an absorptionperiod, means responsive to iiuid pressure for terminat-ing the absorption operation and re'- establishing the generating operation. dependent on the complete exhaustionv of liquid refrigerant from the container.

16.,In an absorption refrigeration apparatus, the. combination with an expansion coil, of generating and `absorbing means, `a condenser, a check valve between the generating means andthe condenser, means automatically terminating the generation.

period consequent upon the temperature on -the generating side of the check valve, and

means ,automatically1 terminating the absorption period consequent on the iuid pressure between the check valve and expansionf' coil. l Y

17. In an absorption refrigeration apparatus of the intermittent type, the combination of a still, means for heating it, means for cooling it, a container for liquidwefrigerant, a connection betwelen the container and the still, a thermostat in the still, a pressure device connected .with the container, and means whereby the thermostat controls the duration of the heating opera-A bination, with a generator-absorber, of a vstationary container for a liquid refrigerant, and means for controlling a reversal of function of the generator-absorber by the com lete exhaustion of liquid refrigerant on the igh pressure side of the apparatus.4

" 19. In 'an absorption refrigeration alpparatus of the intermittent type, the combination, with a generatorabsorber, of means responsive to 'fluid pressure for controlling the termination of -the absorption period dependent upon the complete eX- haustion of liquid refrigerant on the high pressure side of the apparatus.

20. In a refrigerating apparatus, the conibination of a ygenerator-absorber, a receptacle for ammonia condensed to a liquid, means for causing the generator-absorber to be a generator, means' for causingthe generator-absorber to be an absorber, and means -for terminating the absorption period consequent upon the exhaustion of liquid anhydrous ammonia from the receptacle.

21. In* a refrigerating apparatus, of the absorption type, the combination of a generatorabsorber, a condenser, Y means for causing the Igenerator-absorber to act alternately asa generator and as an absorber, and means for preventng'the flow of refrig- .erant from the condenser when a predeterminedV pressure has been reached in the generator-absorber.

22. In a refrigerating apparatus of the absorptionty-pe, the combination of a generator-absorber acting alternately as a generator and as -an absorber, a condenser, a passage leading therefrom, and means .for

shutting ofi the flow through` said passage when the pressure in the generator-absorber has reached a predetermined point.

23. In a refrigerating apparatus of .the absorption type, the combination of a generator-absorber, a condenser, aX conduit from the condenser to the generator-absorber, and

means for shutting oii" the iow from` the* condenser through said conduit, including a pressure-responsive device dependent for its `operation on the pressure Within the generator-absorber.

l24.In a refrigerating apparatus of the Yabsorption type, the combination of a gen- ,--upon the exhaustion of liquid refrigerant from the container.

25. In a refrigeration apparatus ofthe absorption type, the combination with generating and absorbing means, of a liquid refrigerant container, a thermostat responsive to the temperature 1n the generator, means under the control of the thermostat for automatically turning olf the heat and turning on cooling medium, and means for terminating an absorption period consequent upon exhaustion of liquid refrigerant from the container.

26 .LIn a refrigeration apparatus of the ,absorption type, the combination With generating and absorbing means, of a stationary liquid refrigerant container, and means for terminating an absorption period consequent upon the exhaustion of liquid refrigerant from the container. i

27. In a refrigerating4 apparatus of the absorption type, the combination ofa liquid refrigerant container,V an absorber, an eX- pansion coil, and conduits leading from the container to the expansion coil and from the expansion coil to the absorber, a fluid pressure device connected with the liquid refrigerant container, and means actuated by said device for terminating an absorption period.

28. In a refrigerating apparatus of the absorption type, the combination with generating and absorbing means, of a liquid refrigerant container, a fluid pressure device in communication therewith, means actuated by said fluid pressure device for terminating `an absorption period consequent upon an exhaustion of liquid refrigerant from the container, and means for terminating a generating, period consequent upon a predetermined weakness 4of the liquor in the generator.

29. In a refrigerating apparatus of the absorption type, the-combination with heating and cooling means, of a liquid refrigerant container, devices for stopping the heating operation, and a fluid pressure device in connection with the container adapted to stop the absorbing operation.

30. In a refrigerating apparatus, the combination, with an absorber, of a container `for liquid refrigerant, and means responsive to fluid pressurefor termlnatmg thev absorption period consequent upon complete exhaustion of liquid refrigerant from the container.

31. In'a refrigerating apparatus, the combination with generating and absorbing means, of a liquid refrigerant container, a

fluid pressure device connected with the container and having a diaphragm, and mechanism operated by said device for controlling the heating means.

32. In a refrigerating apparatus, the combination with generating means having a shiftable burner, of a liquid refrigerant container, a pressure responsive device actuated consequent upon the exhaustion of liquid refrigerant from the container, and :mechanism operated by the pressure responsive device for shifting the burner.

33. The combination, with generating and absorbing means, of a burner member, a

shield member, one of said members being shiftable with relation to the other, means for supplying water, a device for turning on the water, and shifting the relative positions of the burner and shield to causethe shield to protect the burner, a liquid refrigerant container, and pressure mechanism connected therewith for controlling said device.

3l. The combination with generating and absorbing means, of a shiftable burner,

means for supplying water, a shield, a device for simultaneously shifting the burner to a position under the shield and turning on the( water, a liquid refrigerant container,

and pressure mechanism connected therewith -for controlling said device.

35. In a refrigerating apparatus, the combination witha generator, a burner therefor, a liquid refrigerant container, a chamber connected with the liquid refrigerant container, a movable diaphragm therein, a lever operated by the diaphragm, a tripping device controlled by said lever, and means whereby the tripping devicevmay turn on theburner.

3G. In an absorption refrigeration apparatus,v the combination with absorbing means and a receptacle for liquid refrigerant, of a device adapted to have a movement resulting fromthe dropping of pressure in the receptacle consequent upon the exhaustion of liquid refrigerant therein, and power operated means for terminating the absorption 'period controlled by said device.

37.1n an apparatus of the character described, the combination, with generating and absorbing means, of a condenser, Vmeans for supplying cooling fmedium thereto, means for controlling the application of such supply to the refrigerating medium including a device having a movement determinating -the absorption period, and a presence of two Witnesses, this 18th day controlling device for said power means deof November, A. D. 1912.

.pendent on the exhaustion of liquid refrig- HARRISON H. SOUTHXVORTH. erant fromits receptacle. v Witnesses: 5 In testimony that I claim the foregoing GEORGE R. WILKINS,

as 1n invention I aix m sinature in the T. H. ALFREDS. 

